JPH10330673A - Erasing ink composition - Google Patents
Erasing ink compositionInfo
- Publication number
- JPH10330673A JPH10330673A JP15763897A JP15763897A JPH10330673A JP H10330673 A JPH10330673 A JP H10330673A JP 15763897 A JP15763897 A JP 15763897A JP 15763897 A JP15763897 A JP 15763897A JP H10330673 A JPH10330673 A JP H10330673A
- Authority
- JP
- Japan
- Prior art keywords
- ink composition
- rubber latex
- pigment
- dye
- fine particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は紙面に消しゴムでの
擦過により容易に消去される筆跡をもたらす筆記用の消
去性インキ組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erasable ink composition for writing which provides a handwriting which is easily erased by rubbing with an eraser on a sheet of paper.
【0002】[0002]
【従来の技術】この種の筆記用の消去性インキについて
は、従来より多くの提案がなされている。例えば、特開
平5−214285号には0℃以下の造膜温度もしくは
ガラス転移温度を有する樹脂と顔料を含有してなる消去
性インキ組成物が提案されている。しかしながら、該発
明のインキは着色剤として顔料を用いているので、紙面
に筆記されるとインキ中の顔料粒子が紙の繊維間に浸透
し易い。従って、多量の充填剤が用いられたり、表面塗
工された特殊な加工紙、例えばアート紙,コピー用紙等
の紙面には消しゴム消去性の筆跡をもたらすが、ごく一
般に用いられている上質紙や新聞用紙等の紙面では筆跡
は消去しづらい傾向にあり、すべての紙への適用性があ
るとは言えない。2. Description of the Related Art There have been many proposals for this kind of erasable ink for writing. For example, Japanese Patent Application Laid-Open No. 5-214285 proposes an erasable ink composition containing a resin having a film-forming temperature or a glass transition temperature of 0 ° C. or lower and a pigment. However, since the ink of the present invention uses a pigment as a colorant, the pigment particles in the ink easily penetrate between paper fibers when written on the paper surface. Therefore, although a large amount of filler is used or the surface of special processed paper coated on the surface, for example, art paper, copy paper, etc., gives an eraser-erasable handwriting, it is used for high-quality paper and Handwriting tends to be difficult to erase on paper such as newsprint, and is not applicable to all papers.
【0003】[0003]
【発明が解決しようとする課題】本発明は、前記表面塗
工されたような特殊加工紙面には勿論のこと、ごく一般
に用いられている紙を含む全般の紙面に消しゴムでの擦
過により容易に消去できる筆跡をもたらす筆記用の消去
性インキを提供しようとするものである。SUMMARY OF THE INVENTION The present invention is intended to easily apply not only to a specially processed paper surface coated as described above, but also to general paper surfaces including very commonly used papers by rubbing with an eraser. It is an object of the present invention to provide an erasable ink for writing that provides erasable handwriting.
【0004】[0004]
【課題を解決するための手段】本発明の消去性インキ組
成物は、必須成分として着色剤、ゴムラテックス及び水
を含む組成であり、前記着色剤は油溶性染料,分散染料
及び顔料から選ばれる色素を内包したマイクロカプセル
又は前記色素を均質状態に担持した油性媒体を内包した
マイクロカプセルからなる着色微粒子であり、該着色微
粒子が前記ゴムラテックスを含む水性媒体中に分散され
た水性インキである。The erasable ink composition of the present invention comprises a colorant, a rubber latex and water as essential components, and the colorant is selected from oil-soluble dyes, disperse dyes and pigments. Colored fine particles comprising microcapsules enclosing a dye or microcapsules enclosing an oil-based medium in which the dye is carried in a homogeneous state, wherein the colored fine particles are an aqueous ink dispersed in an aqueous medium containing the rubber latex.
【0005】前記油溶性染料及び分散染料はそれぞれカ
ラーインデックスのソルベント染料及び分散染料に分類
される染料から選ばれ、化学構造ではアゾ系、金属錯塩
アゾ系、アンスラキノン系及び金属フタロシアニン系の
構造を有する染料である。前記顔料はアゾ系、アンスラ
キノン系、縮合ポリアゾ系、チオインジゴ系、金属錯塩
系、フタロシアニン系、ペリノン系、ペリレン系、ジオ
キサジン系及びキナクリドン系の有機顔料、カーボンブ
ラック、酸化鉄等の無機顔料である。前記油性媒体は何
らかの揮発性有機溶剤に溶解し、且つ水不溶性であり、
常温で難揮発性又は不揮発性の液体乃至固体状の物質で
あり、前記色素を均質状態に保持する担体として用いら
れる。油性媒体として用いられる物質は、一塩基酸エス
テル、二塩基酸モノ又はジエステル、多価アルコールの
部分エステル乃至完全エステル等のエステル類、アルキ
ルベンゼン,アルキルナフタレン等の芳香族炭化水素
類、高級アルコール類、パラフィン等の脂肪族炭化水素
類、高級脂肪酸類、ポリアルキレンオキサイドのモノ又
はジエステル類、ケトン類、エーテル類から選ばれる単
独又は2種以上の混合物である。The oil-soluble dye and the disperse dye are selected from dyes classified into a solvent dye and a disperse dye having a color index, respectively, and have chemical structures of azo, metal complex salt azo, anthraquinone and metal phthalocyanine. It is a dye having. The pigment is an inorganic pigment such as an azo-based, anthraquinone-based, condensed polyazo-based, thioindigo-based, metal complex salt-based, phthalocyanine-based, perinone-based, perylene-based, dioxazine-based and quinacridone-based organic pigment, carbon black, or iron oxide. . The oily medium is soluble in some volatile organic solvent, and is water-insoluble;
It is a non-volatile or non-volatile liquid or solid substance at room temperature, and is used as a carrier for maintaining the dye in a homogeneous state. Substances used as the oily medium include monobasic acid esters, dibasic acid mono- or diesters, esters such as partial or complete esters of polyhydric alcohols, aromatic hydrocarbons such as alkylbenzene and alkylnaphthalene, higher alcohols, It is a single or a mixture of two or more selected from aliphatic hydrocarbons such as paraffin, higher fatty acids, mono or diesters of polyalkylene oxides, ketones and ethers.
【0006】前記マイクロカプセルは、前記色素又は該
色素を油性媒体中に溶解又は分散させてなる着色体を公
知のマイクロカプセル化法により壁膜形成物質からなる
殻体に内包させた着色微粒子である。前記殻体を形成す
る壁膜形成物質としては、ゼラチン,シェラック,アラ
ビアガム,ロジン,ロジンエステル,エチルセルロー
ス,カルボキシメチルセルロース,パラフィン,トリス
テアリン,ポリビニルアルコール,ポリエチレン,ポリ
プロピレン,アクリル系樹脂,ビニル系樹脂、ポリイソ
ブテン,ポリウレタン,ポリブタジエン,ポリエステ
ル,ポリアミド,エポキシ樹脂,フェノール樹脂,シリ
コーン樹脂,ポリスチレン,メラミン樹脂等を単独又は
混合して使用することができる。適用できるマイクロカ
プセル化法としては、コアセルベーション法、インサイ
チュー重合法、界面重合法、液中硬化被膜法、水溶液か
らの相分離法、有機溶媒からの相分離法、融解分散冷却
法、気中けん濁被覆法、スプレードライイング法等の公
知の方法があげられる。本発明インキに適用される前記
マイクロカプセルは0.1μm乃至10μmの範囲の平
均粒子径を有する着色微粒子であり、インキ組成中1乃
至30重量%の範囲で用いられる。The microcapsules are colored fine particles in which the pigment or a colored body obtained by dissolving or dispersing the pigment in an oil medium is encapsulated in a shell composed of a substance forming a wall film by a known microencapsulation method. . Examples of the wall film forming substance forming the shell include gelatin, shellac, gum arabic, rosin, rosin ester, ethyl cellulose, carboxymethyl cellulose, paraffin, tristearin, polyvinyl alcohol, polyethylene, polypropylene, acrylic resin, vinyl resin, Polyisobutene, polyurethane, polybutadiene, polyester, polyamide, epoxy resin, phenol resin, silicone resin, polystyrene, melamine resin and the like can be used alone or in combination. Applicable microencapsulation methods include coacervation method, in-situ polymerization method, interfacial polymerization method, submerged hard coating method, phase separation method from aqueous solution, phase separation method from organic solvent, melt dispersion cooling method, Known methods such as a medium suspension coating method and a spray drying method can be used. The microcapsules applied to the ink of the present invention are colored fine particles having an average particle size in the range of 0.1 μm to 10 μm, and are used in the range of 1 to 30% by weight in the ink composition.
【0007】ゴムラテックスとしてはアクリロニトリル
・ブタジエンゴム,カルボキシル化アクリロニトリル・
ブタジエンゴムなどのアクリロニトリル・ブタジエン系
ゴムラテックス、メチルメタクリレート・ブタジエン,
カルボキシル化メチルメタクリレート等のメチルメタク
リレート・ブタジエン系ゴムラテックス、スチレン・ブ
タジエン,カルボキシル化スチレンブタジエン等のスチ
レン・ブタジエン系ゴムラテックス、アクリレート系ゴ
ムラテックス、塩化ビニル系ゴムラテックス、ビニルピ
リジン・スチレン・ブタジエン系ゴムラテックス、クロ
ロプレン系ゴムラテックス等があげられ、ラテックスエ
マルションとして水性分散体の形態で販売されているも
のが好適に用いられる。これらゴムラテックスはインキ
組成中、固形分換算で5乃至60重量%好ましくは20
乃至50重量%の範囲で用いられる。5重量%未満の添
加では良好な筆跡消去性が得られず、60重量%を超え
る量の添加はインキが高粘度化してマーキングペンやボ
ールペンでの使用を困難にする。As rubber latex, acrylonitrile / butadiene rubber, carboxylated acrylonitrile /
Acrylonitrile / butadiene rubber latex such as butadiene rubber, methyl methacrylate / butadiene,
Methyl methacrylate / butadiene rubber latex such as carboxylated methyl methacrylate, styrene / butadiene rubber latex such as styrene / butadiene, carboxylated styrene butadiene, acrylate rubber latex, vinyl chloride rubber latex, vinylpyridine / styrene / butadiene rubber Latex, chloroprene rubber latex and the like can be mentioned, and those sold as an aqueous dispersion as a latex emulsion are preferably used. These rubber latexes are contained in the ink composition in an amount of 5 to 60% by weight, preferably 20 to 60% by weight in terms of solid content.
To 50% by weight. If the amount is less than 5% by weight, good handwriting erasability cannot be obtained, and if the amount exceeds 60% by weight, the viscosity of the ink becomes high, making it difficult to use it in a marking pen or ballpoint pen.
【0008】また、マーキングペンやボールペン等のペ
ン先でのインキの水分の蒸発を抑制する保水剤としての
エチレングリコール,プロピレングリコール,グリセリ
ン,ヘキシレングリコール,1,3−ブタンジオール、
ネオプレングリコール等の多価アルコール、潤滑剤、防
腐剤、インキ流動性の向上や分散、乳化安定化のための
界面活性剤も必要に応じて添加される。更に、ペン内に
インキ流動調節部材を備えない簡易な構造の水性ボール
ペンに本発明インキを適用する場合には、キサンタンガ
ム,ウェランガム,サクシノグリカン等の多糖類で揺変
性を付与させた粘性のインキとして用いる。これら多糖
類が添加される場合、インキ組成中0.1〜0.8重量
%の範囲で添加される。[0008] Further, ethylene glycol, propylene glycol, glycerin, hexylene glycol, 1,3-butanediol, and the like as water retention agents for suppressing the evaporation of ink moisture at a pen tip such as a marking pen or a ballpoint pen,
Polyhydric alcohols such as neoprene glycol, lubricants, preservatives, and surfactants for improving the ink fluidity, dispersing, and stabilizing the emulsion are also added as necessary. Further, when the ink of the present invention is applied to an aqueous ballpoint pen having a simple structure without an ink flow control member in the pen, a viscous ink imparted with thixotropic properties with a polysaccharide such as xanthan gum, welan gum, succinoglycan, etc. Used as When these polysaccharides are added, they are added in the range of 0.1 to 0.8% by weight in the ink composition.
【0009】[0009]
【発明の実施の形態】本発明の消去性インキ組成物は、
前記公知のマイクロカプセル化法により調製される着色
微粒子(色素内包マイクロカプセル)分散液、ゴムラテ
ックス及び所定量の水を混合した混合物を、ディスパー
にかけ約1時間攪拌し、更に添加剤を添加して約2時間
攪拌することにより得られる。BEST MODE FOR CARRYING OUT THE INVENTION The erasable ink composition of the present invention comprises:
A mixture of a dispersion of colored fine particles (microcapsules containing pigment), a rubber latex and a predetermined amount of water prepared by the known microencapsulation method is dispersed, stirred for about 1 hour, and further added with additives. Obtained by stirring for about 2 hours.
【0010】[0010]
1.着色微粒子(色素内包マイクロカプセル)分散液の
調製 黒色微粒子分散液A 塩化ビニル/酢酸ビニル共重合体樹脂で表面処理された
カーボンブラック加工顔料(チバガイギー社製マイクロ
リスブラックC−K)10gと2−エチルヘキサン酸セ
チル10gをメチルエチルケトン50g中に分散,溶解
し、このカーボンブラック分散体にコロネートL(多価
イソシアネート、日本ポリウレタン工業(株)製)10
gを加えて加温下均質に混合したものを、約70℃に加
温された5%ポリビニルアルコール水溶液60g中に
0.5〜1.0μmの微小滴となるようホモミキサーで
乳化させる。得られた乳化液を攪拌しつつ、そこにジエ
チレントリアミン1gを水24g中に溶解した溶液を約
30分かけて微量づつ滴下する。次いで液温を80℃に
あげて約3時間攪拌し続けることにより、メチルエチル
ケトンは揮散して前記カーボンブラック/2−エチルヘ
キサン酸セチル分散体内包の黒色微粒子分散液Aが得ら
れた。この分散液中の黒色微粒子は平均粒子径3.0μ
mであった。1. Preparation of Dispersion of Colored Fine Particles (Dye-Encapsulated Microcapsules) Black Fine Particle Dispersion A 10 g of carbon black processed pigment (Microlith Black CK manufactured by Ciba Geigy) surface-treated with vinyl chloride / vinyl acetate copolymer resin and 2- 10 g of cetyl ethylhexanoate is dispersed and dissolved in 50 g of methyl ethyl ketone, and the carbon black dispersion is treated with Coronate L (polyvalent isocyanate, manufactured by Nippon Polyurethane Industry Co., Ltd.).
g of the mixture and homogenously mixed under heating is emulsified in 60 g of a 5% aqueous solution of polyvinyl alcohol heated to about 70 ° C. using a homomixer so as to form microdroplets of 0.5 to 1.0 μm. While stirring the obtained emulsion, a solution in which 1 g of diethylenetriamine is dissolved in 24 g of water is dripped little by little over about 30 minutes. Subsequently, the liquid temperature was raised to 80 ° C., and stirring was continued for about 3 hours, so that methyl ethyl ketone was volatilized to obtain the black fine particle dispersion liquid A containing the carbon black / 2-ethylhexanoate dispersion. The black fine particles in this dispersion had an average particle size of 3.0 μm.
m.
【0011】 黒色微粒子分散液B 黒色ソルベント染料(C.I.ソルベントブラック2
7)20gをメチルエチルケトン60g中に溶解し、該
溶液にエポキシ樹脂(ビスフェノールA/ジグリシジル
エーテル系、エポキシ当量184〜194)10gを加
えて加温下均質に混合した混合物を、約70℃に加温さ
れた5%ポリビニルアルコール水溶液の50g中に0.
5〜1.5μmの微小滴となるようホモミキサーで乳化
させる。得られた乳化液を攪拌しつつ、そこにエポキシ
樹脂硬化剤(脂肪族ポリアミン)2.5gを水22.5
g中に溶解した溶液を約1時間かけて微量づつ滴下す
る。次いで液温を80℃にあげて約5時間攪拌し続ける
ことにより、メチルエチルケトンが揮散して前記黒色ソ
ルベント染料内包の黒色微粒子分散液Bが得られた。こ
の分散液中の黒色微粒子は平均粒子径1.0μmであっ
た。Black Fine Particle Dispersion B Black Solvent Dye (CI Solvent Black 2)
7) Dissolve 20 g in 60 g of methyl ethyl ketone, add 10 g of an epoxy resin (bisphenol A / diglycidyl ether type, epoxy equivalent: 184 to 194) to the solution, and heat and uniformly mix the mixture at about 70 ° C. 0.1% in 50 g of warm 5% aqueous polyvinyl alcohol solution.
The mixture is emulsified with a homomixer so as to form fine droplets of 5 to 1.5 μm. While stirring the obtained emulsion, 2.5 g of an epoxy resin curing agent (aliphatic polyamine) was added thereto with 22.5 of water.
The solution dissolved in g is dripped little by little over about 1 hour. Subsequently, the liquid temperature was raised to 80 ° C. and stirring was continued for about 5 hours, whereby methyl ethyl ketone was volatilized to obtain the black fine particle dispersion liquid B containing the black solvent dye. The black fine particles in this dispersion had an average particle size of 1.0 μm.
【0012】 赤色微粒子分散液 塩化ビニル/酢酸ビニル共重合体樹脂で表面処理された
アゾ系赤色顔料10gとミリスチン酸ステアリル10g
をメチルエチルケトン50g中に分散,溶解し、このア
ゾ系赤色顔料分散体にコロネートL(多価イソシアネー
ト、日本ポリウレタン工業(株)製)10gを加えて加
温下均質に混合したものを、約70℃に加温された5%
ポリビニルアルコール水溶液60g中に0.5〜1.0
μmの微小滴となるようホモミキサーで乳化させる。得
られた乳化液を攪拌しつつ、そこにジエチレントリアミ
ン1gを水24g中に溶解した溶液を約30分かけて微
量づつ滴下する。次いで、液温を80℃にあげて約3時
間攪拌し続けることにより、メチルエチルケトンは揮散
して前記アゾ系赤色顔料/ミリスチン酸ステアリル分散
体内包の赤色微粒子分散液が得られた。この分散液中の
赤色微粒子は平均粒子径2.0μmであった。Red Fine Particle Dispersion 10 g of an azo red pigment surface-treated with a vinyl chloride / vinyl acetate copolymer resin and 10 g of stearyl myristate
Was dispersed and dissolved in 50 g of methyl ethyl ketone, 10 g of Coronate L (polyvalent isocyanate, manufactured by Nippon Polyurethane Industry Co., Ltd.) was added to the azo red pigment dispersion, and the mixture was homogeneously mixed under heating at about 70 ° C. 5% warmed to
0.5 to 1.0 in 60 g of polyvinyl alcohol aqueous solution
The mixture is emulsified with a homomixer so as to form micro-droplets. While stirring the obtained emulsion, a solution in which 1 g of diethylenetriamine is dissolved in 24 g of water is dripped little by little over about 30 minutes. Subsequently, the liquid temperature was raised to 80 ° C., and stirring was continued for about 3 hours, whereby methyl ethyl ketone was volatilized to obtain a red fine particle dispersion liquid containing the azo red pigment / stearyl myristate dispersion. The red fine particles in this dispersion had an average particle size of 2.0 μm.
【0013】2.実施例インキ及び比較例インキ 前記各着色微粒子分散液を用いて調製した実施例イン
キ、及び比較例インキの組成を表1に示す。ここで、実
施例1〜3及び比較例1のインキは、マーキングペンに
適用されるインキの例であり、実施例4及び比較例2の
インキは前記簡易構造の水性ボールペンに適用されるイ
ンキの例である。尚、比較例インキの組成は、特開平5
−214285号公報の記載に準拠した組成である。2. Example ink and comparative example ink Table 1 shows the compositions of the example inks and the comparative example inks prepared using the respective colored fine particle dispersions. Here, the inks of Examples 1 to 3 and Comparative Example 1 are examples of inks applied to the marking pen, and the inks of Example 4 and Comparative Example 2 are inks of the ink applied to the water-based ballpoint pen having the simple structure. It is an example. Incidentally, the composition of the comparative example ink is described in
The composition is based on the description in JP-A-214285.
【表1】 [Table 1]
【0014】表中の原料の内容の詳細を注番号に従って
以下に説明する。 (1)カーボンブラックMA−100(三菱化学(株)
製) (2)スチレン・ブタジエンゴムラテックス(固形分7
0%)(Nipol 4850A,日本ゼオン(株)
製) (3)カルボキシル化アクリロニトリル・ブタジエンゴ
ムラテックス(固形分45%,Nipol LX55
0,日本ゼオン(株)製) (4)アクリレートゴムラテックス(固形分45%)
(Nipol LX874,日本ゼオン(株)製) (5)カルボキシル化スチレン・ブタジエンゴムラテッ
クス(固形分41%)(Nipol LX432A,日
本ゼオン(株)製) (6)ポリオキシエチレン(6モル)ソルビットテトラ
オレエート (7)ポリオキシエチレンアルキルエーテル燐酸エステ
ル・モノエタノールアミン塩 (8)ポリオキシエチレン(10モル)ノニルフェニル
エーテル (9)3%レオザン(三晶(株)製品名)水性分散液 レオザン:半合成多糖類(サクシノグリカン)The details of the contents of the raw materials in the table are described below according to the note numbers. (1) Carbon black MA-100 (Mitsubishi Chemical Corporation)
(2) Styrene-butadiene rubber latex (solid content 7)
0%) (Nipol 4850A, Nippon Zeon Co., Ltd.)
(3) Carboxylated acrylonitrile-butadiene rubber latex (solid content 45%, Nipol LX55
0, manufactured by Zeon Corporation) (4) Acrylate rubber latex (solid content 45%)
(Nipol LX874, manufactured by Nippon Zeon Co., Ltd.) (5) Carboxylated styrene / butadiene rubber latex (solid content: 41%) (Nipol LX432A, manufactured by Nippon Zeon Co., Ltd.) (6) Polyoxyethylene (6 mol) sorbit tetra Oleate (7) Polyoxyethylene alkyl ether phosphate ester / monoethanolamine salt (8) Polyoxyethylene (10 mol) nonyl phenyl ether (9) 3% leozan (product name of Sanshin Co., Ltd.) aqueous dispersion Leozan: Semi-synthetic polysaccharide (succinoglycan)
【0015】3.試料インキによる筆跡の消去性テスト (1)試料マーキングペン 繊維束を樹脂で結着させてなるペン体を固定したペン体
ホルダーを弁機構を介して先端に嵌着したアルミニウム
円筒体からなり、マーキング時にペン先を紙面に押しつ
けて弁を開放させて筒内のインキをペン先に導出するタ
イプのマーキングペンを用いた。前記マーキングペンに
実施例1〜3及び比較例1のインキを所定量充填して、
試料ペンとした。 (2)試料ボールペン ボールペン先をポリプロピレンパイプの一端に備えたカ
ートリッジに実施例4及び比較例2の各試料インキを所
定量充填し、該カートリッジを筆記軸に嵌挿させてなる
簡易構造のボールペンを試料ペンとした。 (3)テスト方法 前記各試料ペンで、コート紙,上質紙及び新聞用紙の3
種の紙面に所定の線を描き、得られた筆跡を消しゴムで
擦過して消去性の難易度を判定した。3. Erasability test of handwriting with sample ink (1) Sample marking pen Marking consists of an aluminum cylinder with a pen holder fixed to a pen body made by binding fiber bundles with resin via a valve mechanism. At times, a marking pen was used in which the pen tip was pressed against the paper to open the valve and the ink in the cylinder was led out to the pen tip. Fill the marking pen with a predetermined amount of the inks of Examples 1 to 3 and Comparative Example 1,
A sample pen was used. (2) Ballpoint pen for sample A cartridge having a ballpoint pen at one end of a polypropylene pipe is filled with a predetermined amount of each of the sample inks of Example 4 and Comparative Example 2, and a ballpoint pen having a simple structure is obtained by inserting the cartridge into a writing shaft. A sample pen was used. (3) Test method Each of the sample pens was used for coating paper, woodfree paper and newsprint.
A predetermined line was drawn on the seed paper, and the obtained handwriting was rubbed with an eraser to determine the degree of difficulty of erasability.
【0016】テスト結果を表2に示す。Table 2 shows the test results.
【表2】 表2の筆跡の消去性の判定記号の内容は以下のとおり。 ○:容易に消去される △:5〜6回の擦過でもやや筆跡が残る ×:10回までの擦過では消去不可能[Table 2] The contents of the handwriting erasability determination symbols in Table 2 are as follows. :: Easily erased Δ: Slight handwriting remains after 5 to 6 rubs ×: Cannot be erased by 10 rubs
【0017】[0017]
【発明の効果】本発明の消去性インキ組成物は、表面塗
工の施されたコート紙の紙面には勿論のこと、上質紙や
新聞用紙のようなごく一般に用いられている紙の面にも
消しゴムでの擦過により容易に消去される筆跡をもたら
す。The erasable ink composition of the present invention can be used not only on the surface of a coated paper coated with a surface coating but also on the surface of a paper generally used such as high quality paper or newsprint. Scrubbing with an eraser also results in handwriting that is easily erased.
Claims (3)
ス及び水を含む組成であって、前記着色剤は油溶性染
料,分散染料及び顔料から選ばれる色素を内包したマイ
クロカプセル又は前記色素を均質状態に担持した油性媒
体を内包したマイクロカプセルからなる着色微粒子であ
り、該着色微粒子が前記ゴムラテックスを含む水性媒体
中に分散されてなる消去性インキ組成物。1. A composition containing a colorant, a rubber latex and water as essential components, wherein the colorant is a microcapsule containing a pigment selected from an oil-soluble dye, a disperse dye and a pigment or a homogeneous state of the pigment. An erasable ink composition comprising colored microparticles formed of microcapsules enclosing an oily medium carried on a substrate, wherein the colored microparticles are dispersed in an aqueous medium containing the rubber latex.
の範囲の平均粒子径を有するマイクロカプセルであり、
インキ組成中1〜30重量%の範囲で用いられている請
求項1に記載の消去性インキ組成物。2. The method according to claim 1, wherein the colored fine particles are 0.1 μm to 10 μm.
Microcapsules having an average particle size in the range of
The erasable ink composition according to claim 1, which is used in an amount of 1 to 30% by weight in the ink composition.
担持した油性媒体を内包したマイクロカプセルであり、
前記油性媒体は何らかの揮発性有機溶剤に溶解し且つ水
不溶性であり、常温で難揮発性又は不揮発性の液体乃至
固体状の物質である請求項1又は2に記載の消去性イン
キ組成物。3. The colored fine particles are microcapsules enclosing an oily medium carrying the dye in a homogeneous state,
The erasable ink composition according to claim 1, wherein the oil medium is a liquid or solid substance that is soluble in some volatile organic solvent and insoluble in water, and is hardly volatile or nonvolatile at room temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15763897A JP3805480B2 (en) | 1997-05-29 | 1997-05-29 | Erasable ink composition for ballpoint pens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15763897A JP3805480B2 (en) | 1997-05-29 | 1997-05-29 | Erasable ink composition for ballpoint pens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10330673A true JPH10330673A (en) | 1998-12-15 |
JP3805480B2 JP3805480B2 (en) | 2006-08-02 |
Family
ID=15654107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15763897A Expired - Fee Related JP3805480B2 (en) | 1997-05-29 | 1997-05-29 | Erasable ink composition for ballpoint pens |
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JP (1) | JP3805480B2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010100200A (en) * | 2000-03-15 | 2001-11-14 | 김충경 | Erasable Aqueous Ink for Writing |
WO2003044107A1 (en) * | 2001-11-19 | 2003-05-30 | Mitsubishi Pencil Kabushiki Kaisha | Aqueous ink composition for ball-point pen |
JP2007246826A (en) * | 2006-03-17 | 2007-09-27 | Pilot Ink Co Ltd | Water-based ink composition for ball-point pen and ball-point pen containing the same |
JP2008115206A (en) * | 2006-10-31 | 2008-05-22 | Pentel Corp | Water-based ink composition for ballpoint pen |
WO2008090834A1 (en) * | 2007-01-22 | 2008-07-31 | Sakura Color Products Corporation | Erasable ink composition |
JP2017122168A (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Aqueous ink composition for writing instruments |
WO2017119480A1 (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Microcapsule pigment and water-based ink composition for writing utensil |
JP2017122167A (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Microcapsule pigment |
JP2018020519A (en) * | 2016-08-05 | 2018-02-08 | 株式会社ミマキエンジニアリング | Printed medium manufacturing method, printed medium manufacturing device and ink |
-
1997
- 1997-05-29 JP JP15763897A patent/JP3805480B2/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20010100200A (en) * | 2000-03-15 | 2001-11-14 | 김충경 | Erasable Aqueous Ink for Writing |
WO2003044107A1 (en) * | 2001-11-19 | 2003-05-30 | Mitsubishi Pencil Kabushiki Kaisha | Aqueous ink composition for ball-point pen |
US7279512B2 (en) | 2001-11-19 | 2007-10-09 | Mitsubishi Pencil Kabushiki Kaisha | Water-based ink composition for ballpoint pen |
JP2007246826A (en) * | 2006-03-17 | 2007-09-27 | Pilot Ink Co Ltd | Water-based ink composition for ball-point pen and ball-point pen containing the same |
JP2008115206A (en) * | 2006-10-31 | 2008-05-22 | Pentel Corp | Water-based ink composition for ballpoint pen |
WO2008090834A1 (en) * | 2007-01-22 | 2008-07-31 | Sakura Color Products Corporation | Erasable ink composition |
JP2017122168A (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Aqueous ink composition for writing instruments |
WO2017119480A1 (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Microcapsule pigment and water-based ink composition for writing utensil |
JP2017122167A (en) * | 2016-01-06 | 2017-07-13 | 三菱鉛筆株式会社 | Microcapsule pigment |
JP2018020519A (en) * | 2016-08-05 | 2018-02-08 | 株式会社ミマキエンジニアリング | Printed medium manufacturing method, printed medium manufacturing device and ink |
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